I have a great working Spector Tone Pump that I pulled from my Spector EURO 5 yesterday. It has all the pots and wired ready to drop in. All you have to do is reverse one solder on all the pots to make it normal right handed. I am lefty and reversed the wires. It is a right handed preamp.
Tone Controls: Vol/Vol/Tone/Bass. It will give you 18v of boost in a 9v package (1x9v Battery).
$45 Shipped to Lower 48/USA ONLY
Here is the wiring diagram:
http://www.spectorbass.com/downloads...gSchematic.pdf